Carbon atoms arranged in the shape of a long, hollow cylinder are known as?

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Multiple Choice

Carbon atoms arranged in the shape of a long, hollow cylinder are known as?

Explanation:
This question tests how carbon can take different shapes. A carbon nanotube is a long hollow cylinder formed by rolling a single layer of carbon atoms (graphene) into a tube; this gives extraordinary strength and light weight, and it can conduct electricity depending on how the sheet is rolled. Diamond, in contrast, forms a rigid 3D network of covalent bonds with no hollow tube structure. Graphite consists of flat sheets of carbon atoms arranged in hexagonal patterns stacked together, not tubes. Fullerene describes closed-cage molecules, like soccer-ball shapes, which are spherical or ellipsoidal rather than long cylinders.

This question tests how carbon can take different shapes. A carbon nanotube is a long hollow cylinder formed by rolling a single layer of carbon atoms (graphene) into a tube; this gives extraordinary strength and light weight, and it can conduct electricity depending on how the sheet is rolled. Diamond, in contrast, forms a rigid 3D network of covalent bonds with no hollow tube structure. Graphite consists of flat sheets of carbon atoms arranged in hexagonal patterns stacked together, not tubes. Fullerene describes closed-cage molecules, like soccer-ball shapes, which are spherical or ellipsoidal rather than long cylinders.

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